How to reinstall the Cubase's stock Plug-ins?

Hi, May I know how to reinstall the plugins without a full reinstallation?

The CurveEQ plugin is overridden by a trial version I installed from the Voxengo website.

I am using Cubase 10.5. I have tried to install the 10.5.30 update and the CurveEQ seems not in the package. The CurveEQ is still the demo version after this update.

IIRC you just need to uninstall the trial version (doesn’t work with two instances of the very same plugin) or just remove the demo plugin version from the path you set up. After doing a manual rescan or Cubase restart it should show the stock version of CurveEQ again.